如何在IOS中使用Cordova插件

一、准备

插件功能：打开IOS相机

1:创建插件

plugman create --name [插件名称] --plugin_id [插件ID] --plugin_version [插件版本号]plugman create --name CameraDemo --plugin_id cordova-plugin-camerademo --plugin_version 1.0.0

2:添加IOS平台

plugman platform add --platform_name ios

3:创建package.json文件

以下两种都可以生成package.json1：使用命令 “npm init” 创建package.json文件2：plugman createpackagejson [插件路径]原应用使用的ionic UI框架，没有package.json无法安装插件

最终插件目录结构

除了ViewController.h和ViewController.m文件，其余的文件通过上述步骤都会自动生成

二、过程

创建文件ViewController.h和ViewController.mViewController.h

#import <UIKit/UIKit.h>@interface ViewController : UIViewController{}@property (nonatomic,strong) UIImagePickerController *imagePicker;- (void)getDeviceInfo; //获取ios设备信息- (void)OpenCamera;//打开ios相机@end

ViewController.m

#import 'ViewController.h'@interface ViewController ()@end@implementation ViewController- (id) init{ NSLog(@'=======================相机初始化'); self = [super init]; self.imagePicker = [[UIImagePickerController alloc] init]; return self;}- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view.UIButton *button =[[UIButton alloc]init]; [button setTitle:@'我是按钮' forState:(UIControlStateNormal)]; [button setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)]; [button setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)]; [button setBackgroundColor:[UIColor yellowColor]]; [button setFrame:CGRectMake(10, 50, 100, 30)]; //事件 //[button addTarget:self action:@selector(click) forControlEvents:(UIControlEventTouchUpInside)]; [self.view addSubview:button];UIButton *deviceBtn =[[UIButton alloc]init]; [deviceBtn setTitle:@'查看设备信息' forState:(UIControlStateNormal)]; [deviceBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)]; [deviceBtn setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)]; [deviceBtn setBackgroundColor:[UIColor yellowColor]]; [deviceBtn setFrame:CGRectMake(120, 50, 200, 30)]; [deviceBtn addTarget:self action:@selector(getDeviceInfo) forControlEvents:(UIControlEventTouchUpInside)]; [self.view addSubview:deviceBtn];UIButton *openCameraBtn =[[UIButton alloc]init]; [openCameraBtn setTitle:@'打开相机' forState:(UIControlStateNormal)]; [openCameraBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)]; [openCameraBtn setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)]; [openCameraBtn setBackgroundColor:[UIColor yellowColor]]; [openCameraBtn setFrame:CGRectMake(330, 50, 200, 30)]; [openCameraBtn addTarget:self action:@selector(openCamera) forControlEvents:(UIControlEventTouchUpInside)]; [self.view addSubview:openCameraBtn];}- (void)getDeviceInfo{ NSLog(@'获取设备信息。。。。'); NSString *name = [[UIDevice currentDevice] name]; NSString *systemName = [[UIDevice currentDevice] systemName]; NSString *systemVersion = [[UIDevice currentDevice] systemVersion]; NSString *model = [[UIDevice currentDevice] model]; NSString *localizeModel = [[UIDevice currentDevice] localizedModel];UILabel *nameL = [[UILabel alloc] init]; UILabel *systemNameL = [[UILabel alloc] init]; UILabel *systemVersionL = [[UILabel alloc] init]; UILabel *modelL = [[UILabel alloc] init]; UILabel *localizeModelL = [[UILabel alloc] init];[nameL setText:name]; [systemNameL setText:systemName]; [systemVersionL setText:systemVersion]; [modelL setText:model]; [localizeModelL setText:localizeModel];[nameL setTextColor:[UIColor blueColor]]; [systemNameL setTextColor:[UIColor blueColor]]; [systemVersionL setTextColor:[UIColor blueColor]]; [modelL setTextColor:[UIColor blueColor]]; [localizeModelL setTextColor:[UIColor blueColor]];CGFloat x = 10; CGFloat y = 80; CGFloat width = 200; CGFloat height=20;nameL.frame = CGRectMake(x, y+20, width, height); systemNameL.frame = CGRectMake(x, y+40, width, height); systemVersionL.frame = CGRectMake(x, y+60, width, height); modelL.frame = CGRectMake(x, y+80, width, height); localizeModelL.frame = CGRectMake(x, y+100, width, height);[self.view addSubview:nameL]; [self.view addSubview:systemNameL]; [self.view addSubview:systemVersionL]; [self.view addSubview:modelL]; [self.view addSubview:localizeModelL];}- (void)openCamera{ //NSLog(@'打开摄像头。。。。'); //UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; self.imagePicker.editing = YES; self.imagePicker.delegate = self; self.imagePicker.allowsEditing = YES;if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){NSLog(@'选择相机。。。');self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; }[self presentViewController:self.imagePicker animated:YES completion:nil];}@end

这两个文件其实是我已经在ios原生项目下编译运行过的文件，然后被CameraDemo.m调用。(其实有点类似于库的作用)

直白一点就是。有一个库(ViewController.h和ViewController.m)，提供了一个类ViewController，这个类提供了两个方法

(void)getDeviceInfo; //获取ios设备信息 (void)OpenCamera; //打开ios相机

然后CameraDemo.m去实例化了这个类CameraDemo.m

/********* CameraDemo.m Cordova Plugin Implementation *******/#import <Cordova/CDV.h>#import 'ViewController.h'//这里必须继承CDVPlugin 类，表示CameraDemo是Cordova插件类@interface CameraDemo : CDVPlugin { // Member variables go here.}@property (nonatomic,strong) ViewController *view; //声明一个ViewController- (void)coolMethod:(CDVInvokedUrlCommand*)command; //创建插件自带的方法，可以删除- (void)openCamera:(CDVInvokedUrlCommand*)command;@end@implementation CameraDemo- (void)pluginInitialize{ NSLog(@'===========================初始化CameraDemo'); [super pluginInitialize]; // 实例化ViewController self.view = [[ViewController alloc] init];}//创建插件自带的方法，可以删除- (void)coolMethod:(CDVInvokedUrlCommand*)command{ CDVPluginResult* pluginResult = nil; NSString* echo = [command.arguments objectAtIndex:0]; if (echo != nil && [echo length] > 0) {pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:echo]; } else {pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR]; } [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];}- (void)openCamera:(CDVInvokedUrlCommand*)command{// 将ViewController的实例viewController 显示出来 [self.viewController presentViewController:self.view animated:YES completion:nil]; //ViewController *view = [[ViewController alloc] init]; //[view openCamera]; //CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];; //[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];}@end

CameraDemo.js

var exec = require(’cordova/exec’);exports.coolMethod = function (arg0, success, error) { exec(success, error, ’CameraDemo’, ’coolMethod’, [arg0]);};exports.openCamera = function (arg0, success, error) { exec(success, error, ’CameraDemo’, ’openCamera’, [arg0]);};

plugin.xml (这个文件非常非常的重要，js可以调用oc全靠它，多查查资料)

<?xml version=’1.0’ encoding=’utf-8’?><plugin version='1.0.0' xmlns='http://apache.org/cordova/ns/plugins/1.0' xmlns:android='http://schemas.android.com/apk/res/android'> <name>CameraDemo</name> <js-module name='CameraDemo' src='https://www.haobala.com/bcjs/www/CameraDemo.js'><clobbers target='cordova.plugins.CameraDemo' /> </js-module> <platform name='ios'><config-file parent='/*' target='config.xml'> <feature name='CameraDemo'><param name='ios-package' value='CameraDemo' onload='true'/> </feature></config-file><source-file src='https://www.haobala.com/bcjs/src/ios/CameraDemo.m' /><header-file src='https://www.haobala.com/bcjs/src/ios/ViewController.h' /><source-file src='https://www.haobala.com/bcjs/src/ios/ViewController.m' /> </platform></plugin>

package.json (一般不需要修改)

{ 'name': 'cordova-plugin-camerademo', 'version': '1.0.0', 'description': '', 'cordova': { 'id': 'cordova-plugin-camerademo', 'platforms': [ 'ios' ] }, 'keywords': [ 'ecosystem:cordova', 'cordova-ios' ], 'author': '', 'license': 'ISC'}

CameraDemo.js 通过 plugin.xml 配置去调用了原生的ocject-c方法

最后Cordova项目调用插件

重要，如果调用和插件中的plugin.xml配置有关，所以plugin.xml非常重要

// 在项目的 ts文件中调用declare let cordova:anycordova.plugins.CameraDemo.openCamera();

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